Door-closer.



No. 646,720. Patented Apr. 3, I900.

G. J. ADAM.

noon CLOSER.

' (Application filed Aug. 21, ms.) (No Model.) 2 Shutzr-Sheet l.

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' UNITED STATES I PATENT OFFICE.

GEORGE J. ADAM, OF CHICAGO, ILLINOIS.

DOOR-CLOSER.

SPECIFICATION forming part of Letters Patent No. 646,720, dated April 3,1900. Application filed August 21, 1899, Serial No. 727,897. (No model.)

To all whom it may concern: f

Be it known that I, GEORGE J. ADAM, acitizen of the United States ofAmerica, residing at Chicago, in the county of Cook and State ofIllinois, have invented certainnew and useful Improvements in Door-Closers, of which the following is a specification.

My invention relates to certain improvements in door-closers of theclass which employ a spring arrangedbeneath the floor and' connectedwith the lower hinged corner of the latter, so as to swing it toward theclosed position.

The object of the invention is to make a simple, cheap, and powerfuldevice which shall be both noiseless and rapid in operation and shallexert the greatest force upon the door in the closed position.

To such end the invent-ion'consists in certain novel characteristicsfully described below and definitely pointed out in the claims;

In the drawings, Figure 1 is a side elevation of the closer with the boxpartly broken away. Fig. 2 is a vertical longitudinal section in line 22 of Fig. 3. Fig. 3 is a plan with the cover removed. Fig. 4is "ahorizontal section in line 44. of Fig. 1. Fig. 5 is a transversevertical section in line 5 5 of Fig. 3, and Fig. 6 is a detail view ofthe spring and confining-yoke in which it is placed under tension.

The device shown in the drawings is preferably inclosed in a box A, openat the top and provided with a cover B, secured in place by means ofscrews 19 b. In the bottom of the box is an antifriction-bearing a, andthe cover contains another bearing b the two serving to carrya post orspindle O, the top of which is fitted against rotation in a plate D,adapted for attachment to a door. The post 0 has two ears or hooks c 0'extending laterallyin opposite directions, against which theoperatingspring bears to swing the door. This spring, which is letteredE, ispreferably formed with a tangential loop e, terminating in an eyea,

two coils e 6 having a common axis, and

two tangential end portions or arms e e The spring is supported by ayoke F and adjusting-screw G, threaded in the middle portion of theyoke. The screw has a head g, containing a circumferential groove g anda slot g for the insertion of a screw-driver. The grooved portion of thehead rests in a notch a, in a transverse Wall d of the box, and anopening a in the latter affords access to the slot for purposes ofadjustment. The yoke has hooked arms ff, which rest upon the ears 0 cand also serve to confine the spring. The eye 6' of the latter bearsagainst the head 9 of the screw, so that the arms e e may be drawntoward the eye to bring the spring to the desired tension. The spring,being on tir'ely supported by the yoke and screw, may be lifted,togetherwith the latter,from the box, which is of considerable importance inboth the manufacture and the repair of the device. Figs. 3 andtillustrat-e the operation of the closer. In Fig. 3 the arms e 6 restagainst both the hooks of the yoke and the ears of the post or spindle,so that no tendency exists to rotate the post. Fig. 4 shows how therotation of the post in either direction puts one of the arms of thespring under increased tension, so that the spring tends to turn thepost back to the position of Fig. 3.

It should be noticed that the spring-arms push upon the ears 0 c inlines approximately tangential to the post, so that the purchase of thespring is greatest at about the closed position, also that the ends ofthe spring bear directly upon the spindle-ears without intermediateparts likely to cause a clicking or pou nding. when the door swings fromone side to the other of its closed position. I

While the above description is specific as to the preferred deviceillustrated, I do not intend to limit myself thereby to the exactdetails of the same, as they may be Varied greatly without departingfrom the invention.

I claim as new and desire to secure by Letters Patnt- 1. In adoor-closer, the combination with a suitable frame, of a vertical postjournaled therein provided with two radially-projecting hooked lugs,suitably-supported stops adja cent to said lugs, a pair of spring-coilsar ranged with their axes alongside of andtrans= verse to said post andtheir ends extending from the coils in lines approximately parallel withthe post, the ends upon one side of the coils bearing respectively uponthe corresponding lugs and stops and suitable means of adjustmentbearing upon the opposite ends and upon the frame; substantially asdescribed.

2. In a door-closer, the combination with a suitable frame, of a postjournaled therein provided with a pair of opposite radially-projectinghooks, suitably-supported stops adjacent to said hooks and a springconsisting of a middle U-shaped portion, a pair of coils arranged sideby side upon a common axis alongside of the post and transverse theretoand a pair of substantially-tangential ends or arms extending from saidcoils approximately parallel with the post and bearing respectively uponthe opposite hooks and adjacent stops, the U-shaped central portionbeing secured to the frame and holdingthe coils under tension to crowdthe spring-arms against the hooks; substantially as described.

3. The combination with a frame and a post jonrnaled therein, of a yokehaving hooked arms, an adjusting-screw threaded therein, a spring havinga central loop secured upon the adjusting-screw, coils upon oppositesides of said loop, arms extending from said coils and confined in thehooks of the said yoke and means for supporting the spring and yoke inthe frame with the ends of the spring bearing eccentrically upon thepost; substantially as described.

4. The combination with a frame and a post journaled therein havingoppositely-extending hooked ears, of a yoke having hooked arms, thehooked ends of which are substantially the same distance apart as thesaid ears, an adj LlSt-lllg-SCPGW threaded in the yoke, a spring havingportions bearing respectively upon the adjustingscrew and the hooks ofthe yoke and tending to separate the same and a suitable support in theframe for the adjusting-screw and yoke adapted to hold the ends of thespring which bear upon the books of the yoke in position to engage theears of the post; substantially as described.

5. The combination with a frame having a post journaled therein providedwith oppositely-extending ears, of a yoke havinghooked endscorresponding in position to the said ears, an adj listing-screwthreaded in the yoke and having a head provided with a circumferentialgroove, a support upon the frame to receive the grooved portion of saidhead and, a coiled spring consisting of a central loop encircling thescrew between the head and the yoke, coils upon opposite sides of saidloop and arms extending into the hooks of the yoke adapted to bear uponthe ears of the post; substantially as described.

In witness whereof I have hereunto set my hand at Chicago, in the countyof Cook and State of Illinois, this 1st day of August, A. D. 189.).

GEORGE J. ADAM.

Witnesses:

CHAS. O. SHERVEY, S. Brass.

